2D Ferromagnetic sheet of antiferromagnetic trimeric metal cores

A new 2D polymeric Mn–acetate complex [Mn3(CH3COO)6·2H2O]n has been synthesized in a two step reaction process and characterized by single crystal X-ray crystallography, IR and thermal analyses. Structural analysis indicates that complex 1 crystallized in the P21/n space group and also shows that syn–syn and μ-oxo bridging of acetate ligands forms antiferromagnetic trimeric metal cores which are further connected by syn–anti and anti–anti bridging of acetates, leading to the formation of a 2D coordination sheet structure. These 2D coordination sheets are further connected by supramolecular hydrogen bonding interactions, leading to the formation of a 3D supramolecular structure. During the 3D supramolecular structure formation, the complex forms both right handed and left handed helical supramolecular chains. A variable temperature magnetic study indicates that complex 1 is antiferromagnetic above 105 K, while at lower temperatures (